Noiseless dumb waiter system



Oct. 23, 1934.

C. C. LUNDBERG El' AL NOISELESS DUMB WAITER SYSTEM Filed March 6, 1933 2 Sheets-Sheet SYWMM W a W I m M 1 m m I 55 M! 6 [My Oct. 23, 1934. c. c. LUNDBERG El AL NOISELESS DUMB WAITER SYSTEM 2 Sheets-Sheet 2 Filed March 6, 1953 Patented Oct. 23, 1934 NOISELESS DUMB warren SYSTEM Charles C. Lnndberg, Brooklyn, and Fred E.

- Sparring, New York, N. Y.

Application March 6, 1933, Serial No. 659,866

' This invention relates to a noiseless dumb- 6-6 of Fig. 2 clearly showing how the grease cup waiter system and has for an object to provide is fastened to the weight; "an improved dumb waiter system that will be Figure 7 is a sectional view taken on the line noiseless in operation. 7-7 of Fig. 2; and A further object of this invention is to pro- Figure 8 is a modification showing a guide clip viM-a dumb waiter system in which it will be Iastenedto a wood dumb waiter. hnpoasihle for ith r th d b ait r r th There is shown at 10 a conventional dumb counter weight to become disengaged from the Waiter shaft in which this improved dumb waiter m; t bmme jammed on t gujde system has been installed. The cap of the shaft 10 A tm fmth obkct of this invemion is t 10 is covered by a sheet metal plate 11 which acts provide a dumb waiter system which will have as a upp the Sheaves 12 and 13.

perfmfly l b guides therebyjnsurmg smooth A pair of angle irons 14 and 15 are likewise a d easy running t ll t supported across the top of the shaft 10 by pro- A till further object of t invention is t jecting int-0 the walls 16 on opposite sides of the 15 provide noiseless dumb waiter system which shaft 10. Secured to angle irons 14 and 15 are may be installed more quickly and more easily a ali y of eye bol there being two y than my present system and when installed will bolts on each angle iron and these eye bolts 17 give better service and will last without repairs Serve as upper ing means for the guide {at t m of {he bufldm cable 18 for the dumb waiter 19, and 20 for the 20 gm further object this invention is to counter weight 21, the cable guides 18 and 20 provide a knockdown l metal dumb waiter being secured to the eye bolts 17 by means ofwhich can be assembled on the job, saving time clamps I and m space, and m which t knockdown Another pair of angle irons 23and 24 are buried Wigs ammimmn amount space therein a concrete foundation 25 after having first by making it less expensive to ship and to secured thereto a pair Of eye bolts 26 secured to out 7 each angle iron 23 and 24. The concrete founda- A still further object of this invention is to tion 25 is thickness equal to the length of m a dumb waiter which W111 be both fire the shanks of the eye bolts 26. The'bottoms of proof and burglar proof. l the cables 18 and 20 are fastened by similar clamps 30 v A yet addmoml object of this invention is to 22 to eye bolts 27 forming part of the turn buckles pmvlde a dumb waiterosystem wherein the dumb 28, these turn buckles 28 having a J bolt 29 for waiter is preferably made of metal but wherein securing the same to the eye bolts 26 which are basic features or this system can likewise be secured to the angle irons 23 and 24. As will be applied to dumb waiters made of other materials, apparel? arable gmdes 18 can be quickly I 35 such as 30 and easily assembled or dis-assembled in operawith the foregoing and other objects in View tive position due to the structure just described,

y and the turn buckles 28 serve to place Just the Wm hereinafter become apparent this mven proper amount of tension in the cables 18 and non comprises the constructions combinations 20 so that they will be perfectly plumb and all m n g gggj g flffi ggzg g g z g the slacks will be eliminatedfl (use i d m a p. raw The dumb waiter 19 will preferably be all metal, t e raw being made of sheet metal or sheet iron sections Y Figure 1 is Vertical section through the dumb and other metal units. The back and side walls shaft clearly showing theeguides mounted 31 and 32 of the dumb waiter 19 are composed M ssof a sheet metal member shaped as shown in 38 1s a sectionalrview taken on the 11118 Figure 4, which is held between the top 33 and of 1; bottom 34 of the dumb waiter 19. The top and 50 dumbwaiter;

.llsur fl is a sectional Vie taken onthe line bottom members 33 and 34 are substantially iden- 3.-3 of Fig. 1 showing th b a mounted on the tical, each beingmade of a sheet metal member I having turned over edges 35 which receive and Fisure 4 is a sectional View takenyon the line hold the upper and lower edges of the back'and 4--4 of Figa a side walls 31 and 32. The back and side walls Figure 5 is a sectional view of one of the grease 31 and 32 thus act as a spacer member between cups taken on the line 5--5 of Figthe top 33 and bottom 34. A piece of tubing 36 55 6 is a. sectional view taken on the line extends to each of the i'our corners o! the top and bottom walls 33 and 34 the ends of the tubing 36 being studded as at 37 to receive nuts 38 therecver and thus hold the dumb waiter 19 in assembled position. A shelf 39 may be hinged as at 40 to a ledge 41 secured by any suitable means to the back 31 of the dumb waiter 19. A pair of cross straps 42 are secured on top of the dumb waiter 19 by being placed over the studded ends 3'7 of the tubes 36 before the nuts 38 are placed in position, the cross point 43 being held spaced from the top 33 of the dumb waiter by means of small section of tubing 44. An eye bolt secured in the spacing tubing 44 serves to support the dumb waiter 19 on the lifting cable 46, the cable 45 passing over the sheaves 12 and 13 and is secured at its other end by means of an appropriate eye bolt 47 to the counter weight 21. The tubes 36 are hollow throughout and are of siighily greater internal diameter than the external diameter of the guide cable 18, the guide cable 18 being extended through two of the tubes 36 before they are secured in position. At the upper end of these two guide receiving tubes 36 a grease cup 48 is studded onto the end 37 of the tube 36. The grease cup 48 consists of a tubular section 49, a cap end 50 studded at one end thereof and studded onto the tube 36 at a second cap end 51 having an aperture 52 allowing the cable 18 to pass theretl'uough. The grease cup 48 is kept filled with any suitable cup grease, as at 53, it be ng only necessary to unthread the cap 51 to refill the grease cup 48. As will be obvious the guide cable 18 and the inside of the tube 36 will be kept thoroughly greased as the grease cup 48 travels up and down the cable 18. It will be understood, however, that although only two cables 18 have been shown as passing through two of the tubes 36, it is within the purview of this invention that similar cables 18 and grease cups 48 may be provided for each of the additional tubes 36, if desired. The counter weight 21 is guided up and down the guide cables 20 by means of an upper guide clip 54 secured thereto by a bolt and nut 55 and lower guide clip 56 secured thereto by a bolt and nut 55. The opposite ends of the upper guide clip 54 are formed into encircling bands 57 for holding grease cups 58, the grease cups 56 being similarly formed of a tube section 59 through which are threaded upper and lower cap sections 60 whereby they may be kept filled with a suitable type of cup grease. The upper and lower cap sections 60 are each provided with an aperture 61 to permit the guide cables 20 to pass therethrough, thus keeping the guide cable 20 properly greased at all times. The lower guide clip 56 is provided with a pair of turned over ends 62 within which the guide cable 20 passes, cable 20 having already been properly greased by passing through the grease cup 58 in the upper guide clip 54.

As a result of the construction just described, the guide cables 18 and 20 are kept in a condition of proper lubrication thus insuring absolutely noiseless operation at all times. By suitably tightening the turn buckles 28, the guide cables 13 and 20 are kept absolutely plumb at all times, thereby keeping the dumb waiter 19 and the counter weight 21 spaced away from the sides of the shaft a sufficient distance to guarantee against any contact between either the dumb waiter 19 or the counter weight 21 and the sides of the shaft, even though the sides of the shaft may become somewhat out of plumb due to cracking or settling. When the dumb waiter is made of wood instead of in the preferred manner, as

above described, of metal, guide clips 66 are secured as at 67 to one of the walls 68 of the wooden dumb waiter, guide clips 66 being preferably of a substantial length up to the height of the dumbwaiter per se, and the ends thereof are turned over as at 68 to permit the guide cable 18 to move up and down therein. With this system the dumb waiter may be easily installed in the shaft without disturbing the shaft opening, it being only necessary to select a suitable size of dumb waiter 19 so that it may be installed clear of the sides 16 of the shaft 10, according to the manner above set forth.

As will be apparent from the above description, the entire dumb waiter system may be easily knocked down for storage or for shipment, occupying a minimum amount of space. The back walls 31 and side walls 32 serve as a container for the remainder of the equipment when storing or shipping the same.

The novel features and the operation of this device will be apparent from the foregoing description. While the device has been shown and the structure described in detail, it is obvious that this is not to be considered limited to the exact form disclosed and that changes may be made therein within the scope of what is claimed without departing from the spirit of the invention. Having thus set forth and disclosed the nature of this invention, what is claimed is:

1. In a dumb waiter system having a shaft, cable guide means anchored in said shaft and spaced from the sides of said shaft, a dumb waiter, and a plurality of tube means forming an integral part of said dumb waiter slidably receiving said cable guide means therethrough.

2. In a dumb waiter system having a shaft, cable guide means anchored in said shaft and spaced from the sides of said shaft, a dumb waiter, a plurality of tube means forming an integral part of said dumb waiter slidably receiving said cable guide means therethrough. and lubricating means secured on said cable receiving means continuously lubricating said cable guide means during operation.

3. In a dumb waiter system having a shaft, cable guide means anchored in said shaft and spaced from the sides of said shaft, a dumb waiter, means forming an integral part of said dumb waiter slidably receiving said cable guide means tlierethrough, said cable guide receiving means comprising one or more hollow tubes extending the height of the dumb waiter and located at the corners thereof.

4. In a dumb waiter system having a shaft, cable guide means anchored in said shaft and spaced from the sides of said shaft, a dumb waiter, means forming an integral part of said dumb waiter slidably receiving said cable guide means therethrough, said cable guide receiving means comprising one or more hollow tubes extending the height of the dumb waiter and located at the corners thereof, and a grease cup secured on each of said one or more cable guides receiving tubes and aligned therewith, causing said cable guides to lubricate itself and said hollow tubes during operation.

5. In a dumb waiter system, a knock-down metal dumb waiter, said dumb waiter comprising a back wall and two side walls, a top ceiling and a bottom floor, a flange depending from said top ceiling and a flange projecting upwardly from said bottom wall, said flanges embracing the back and side walls of said dumb waiter, a plurality of tube members connecting said top ceiling and bottom floor together, said back wall and side wall members being between said tube members and said ceiling and floor flanges.

6. In a dumb waiter system, a knock-down metal dumb waiter, said dumb waiter comprising a back wall and two side walls, a top ceiling and a bottom floor, a flange depending from said top ceiling and a flange projecting upwardly from said bottom wall, said flanges embracing the back and side walls of said dumb waiter, a plurality of tube members connecting said top ceiling and bottom floor together, said back wall and side wall members being between said tube members and said ceiling and floor flanges, cable guide means in said dumb waiter system, some of said tube members also serving to slidably receive said cable guide means therethrough.

7. In a dumb waiter system, a knock-down metal dumb waiter, said dumb waiter comprising a back wall and two side walls, a. top ceiling and a bottom floor, a flange depending from said top ceiling and a flange projecting upwardly from said bottom wall, said flanges embracing the back and side walls of said dumb waiter, a plurality of tube members connecting said top ceiling and bottom floor together, said back wall and side wall members being between said tube members and said ceiling and floor flanges, cable guide means in said dumb waitersystem, some of said tube members also serving to slidably receive said cable guide means therethrough, and hollow grease cup members aligned with and secured to said cable guide means receiving tubes.

CHARLES C. LUNDBERG. FRED E. SPARRING. 

